Changes

 ====Thermal Decomposition Reactions====: Calcium Carbonate → Calcium Oxide + Carbon Dioxide: Copper Carbonate → Copper Oxide + Carbon Dioxide: Zinc Carbonate → Zinc Oxide + Carbon Dioxide ====Combustion Reactions====: Methane + Oxygen → Carbon Dioxide + Water: Ethane + Oxygen → Carbon Dioxide + Water: Propane + Oxygen → Carbon Dioxide + Water : Magnesium + Oxygen → Magnesium Oxide: Aluminium + Oxygen → Aluminium Oxide: Iron + Oxygen → Iron Oxide